Comment 55 for bug 1414930

@Timo, yes I installed both packages. I went to 15.04 beta 2 yesterday and so far haven't seen any graphics issues, but the touchpad issue exists (as @Julian indicates). For now I'll probably stick with that and one of the touchpad workarounds I can live with for now, under the assumption that 15.04 is the most likely to see the fix first.